journal article·2018-11

Dynamic Visualization of Stress/Strain Distribution and Fatigue Crack Propagation by an Organic Mechanoresponsive AIE Luminogen

Zijie Qiu, Weijun Zhao, Mingkui Cao, Yuqi Wang, Jacky W. Y. Lam, Zhe Zhang, Xu Chen, Ben Zhong Tang

Advanced Materials· Volume 30· Issue 44
Publisher page

Abstract

Abstract Stress exists ubiquitously and is critically important for the manufacturing industry. Due to the ultrasensitive mechanoresponse of the emission of 1,1,2,2,‐tetrakis(4‐nitrophenyl)ethane (TPE‐4N), a luminogen with aggregation‐induced emission characteristics, the visualization of stress/strain distributions on metal specimens with a pure organic fluorescent material is achieved. Such a fluorescence mapping method enjoys the merits of simple setup, real‐time, full‐field, on‐site, and direct visualization. Surface analysis shows that TPE‐4N can form a nonfluorescent, crystalline uniform film on the metal surface, which cracks into fluorescent amorphous fragments upon mechanical force. Therefore, the invisible information of the stress/strain distribution of the metal specimens are transformed to visible fluorescent signals, which generally matches well but provides more details than software simulation. Remarkably, fatigue crack propagation in stainless steel and aluminum alloy can be observed and predicted clearly, further demonstrating the ultrasensitivity and practicability of TPE‐4N.
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Research context

OpenAlex topics: Luminescence and Fluorescent Materials · Polydiacetylene-based materials and applications · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China

HKUST‐Shenzhen Research Institute No. 9 Yuexing 1st RD, South Area, Hi‐tech Park, Nanshan Shenzhen 518057 China

Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China

Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China

NSFC Center for Luminescence from Molecular Aggregates SCUT‐HKUST Joint Research Institute State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Funding

National Natural Science Foundation of China · Research Grants Council, University Grants Committee · Innovation and Technology Commission

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